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Coal slurry water turbidity determination method

A measurement method and technology for coal slime water, which can be applied in the direction of testing water, material inspection products, etc., can solve the problems of poor sedimentation performance, good sedimentation performance, and large fluctuation of coal slime water, and achieve wide practicability, good sedimentation performance, and true turbidity. small effect

Inactive Publication Date: 2010-08-25
CHINA UNIV OF MINING & TECH
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

3) Large fluctuations
High hardness, good slime water settling performance, low hardness, poor coal slime water settling performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1. The type of raw coal to be washed is anthracite, and the mudification rate is 15%. Controlling the amount of raw coal to be washed is the system design capability.

[0019] Start the sorting system, and when the slime water completes a cycle, take a 500mL water sample at the feed inlet of the concentrator, and use a hardness tester to measure the hardness of the circulating water to 5 German degrees. At the same time, a 500mL water sample was taken from the overflow of the concentrator, and the turbidity data of the water sample was measured with a turbidimeter to be 120 NTU. Samples were also taken 1, 2, 3, and 4 hours later, and the hardness value was determined to be 5 German degrees, and the turbidity was 123 NTU, 120 NTU, 122 NTU, and 120 NTU respectively. The obtained data indicates that when the water hardness of the coal slurry is 5 German degrees, the corresponding turbidity range is 120 NTU-123 NTU.

[0020] Add soluble calcium salt gypsum to th...

Embodiment 2

[0024] Embodiment 2. The type of raw coal to be washed is changed to 1 / 3 coking coal, and the mudification rate is 21%. It is necessary to recalibrate the hardness-turbidity relationship diagram.

[0025] The operation steps are exactly the same as in Example 1. When the slime water completes a cycle, the water hardness is measured to be constant at 8 German degrees, and the corresponding turbidity is 116 NTU, 120 NTU, 118 NTU, and 118 NTU, so the corresponding turbidity range It is 116 NTU-120 NTU.

[0026] Also use gypsum to adjust the circulating water hardness to 18 German degrees, 28 German degrees, 38 German degrees, and 48 German degrees. After each hardness adjustment, the hardness and its corresponding turbidity range were tested, and a total of 5 sets of data were obtained. Based on the above data, a hardness-turbidity relationship diagram was drawn.

[0027] When the system enters the normal operation stage, use a hardness tester to measure the hardness of the con...

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Abstract

The invention relates to a measuring method for slime water turbidity suitable for cycling slime water in coal preparation plant especially. Based on the related relationship of turbidity and rigidity, by measuring rigidity of slime water real turbidity and sedimentation performance of cycling slime water can be reflected. Water hardness of in-material in concentration equipment of stable slime water system and corresponding flooding turbidity range are measured by hardness meter and turbidimeter respectively and rigidity-turbidity relation graph is drawn. In practice hardness meter is used to measure water hardness of in-material in concentration equipment on line and contrasts rigidity-turbidity relation graph to obtain real turbidity range of cycling water. The method can reflect turbidity of cycling water, sedimentation performance and change trend accurately. It conquers disadvantages of multiple interferences, big fluctuation and serious lag and so on possessed by adding drug control index in measuring turbidity index directly.

Description

technical field [0001] The invention relates to a method for measuring the turbidity of coal slime water, which is especially suitable for measuring the "true turbidity" of circulating coal slime water in a coal preparation plant. Background technique [0002] The settlement performance of the circulating coal slurry water in the coal preparation plant directly determines whether the coal preparation plant can produce continuously and stably. If the settling performance of the circulating coal slime water is poor, even if a large amount of flocculation agent is put in, the turbidity of the circulating water will continue to increase. In severe cases, the ash content of the clean coal will exceed the standard, the recovery rate will decrease, and the system will be paralyzed. Therefore, the coal preparation plant attaches great importance to the settling performance of the slime water. . [0003] At present, almost all coal preparation plants directly measure the overflow tu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/18
Inventor 刘炯天王永田曹亦俊张明青冯莉
Owner CHINA UNIV OF MINING & TECH
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